﻿<!DOCTYPE html>
<html>
<head>
  <title>Rescaling GraphObjects using the RescalingTool</title>
  <!-- Copyright 1998-2020 by Northwoods Software Corporation. -->
  <meta name="description" content="A demonstration of the RescalingTool extension." />
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <script src="../assets/js/goSamples.js"></script> <!-- this is only for the GoJS Samples framework -->
</head>
<body>
  <div id="sample">
    <div id="myDiagramDiv" style="border: solid 1px black; width:100%; height:400px"></div>
    <p>
      Selecting a node will show a rescaling handle that when dragged will modify the node's <a>GraphObject.scale</a> property.
    </p>
    <p>
      Just as the <a>ResizingTool</a> changes the <a>GraphObject.desiredSize</a> of an object,
      and just as the <a>RotatingTool</a> changes the <a>GraphObject.angle</a> of an object,
      the <a>RescalingTool</a> changes the <a>GraphObject.scale</a> of an object.
    </p>
  </div>
  <script type="module" id="code">
    import * as go from "../release/go-module.js";
    import { RescalingTool } from "./RescalingTool.js";

    if (window.goSamples) goSamples();  // init for these samples -- you don't need to call this
    const $ = go.GraphObject.make;  // for conciseness in defining templates

    const myDiagram = $(go.Diagram, "myDiagramDiv",  // create a Diagram for the DIV HTML element
      {
        layout: $(go.TreeLayout),
        "undoManager.isEnabled": true  // enable undo & redo
      });

    // install the RescalingTool as a mouse-down tool
    myDiagram.toolManager.mouseDownTools.add(new RescalingTool());

    myDiagram.nodeTemplate =
      $(go.Node, "Auto",
        { locationSpot: go.Spot.Center },
        new go.Binding("scale").makeTwoWay(),
        $(go.Shape, "RoundedRectangle", { strokeWidth: 0 },
          new go.Binding("fill", "color")),
        $(go.TextBlock,
          { margin: 8 },
          new go.Binding("text"))
      );

    // but use the default Link template, by not setting Diagram.linkTemplate

    // create the model data that will be represented by Nodes and Links
    myDiagram.model = new go.GraphLinksModel(
    [
      { key: 1, text: "Alpha", color: "lightblue" },
      { key: 2, text: "Beta", color: "orange" },
      { key: 3, text: "Gamma", color: "lightgreen" },
      { key: 4, text: "Delta", color: "pink" }
    ],
    [
      { from: 1, to: 2 },
      { from: 1, to: 3 },
      { from: 3, to: 4 }
    ]);

    window.myDiagram = myDiagram; // Attach to the window for console debugging
  </script>
</body>
</html>